Abstract: The spores of six species of S.boninensis Baker，S.willdenowii (Desv.) Baker，S.xipholepis Baker，S.indica　（Milde）R.M.Tryon，S.wallichii　（Hook.et Grev.）Spring，S.arbuscula　（Kaulf.）Spring from torrid and subtorrid zone were observed by  SEM．The results showed that the spore morphology of seleginellaceae is radiosymmetic and trilete with intricate surface ornamentation;the sporodem ornamentation is mainly composite and distinct.The results provide some basic materials for the study of the morphology and systematic evolution of Selaginellaceae.

Key words: Selaginellaceae, spore morphology, SEM